Beast Boy is another good option. His ability to transform into different animals can bring humor to the fanfiction. He could also be a mediator between Starfire and Blackfire, using his light - hearted nature to ease the tension between the two sisters. His friendship with Starfire can also be explored further in relation to Blackfire.
Starfire's age varies depending on different storylines and comic arcs. But generally, she's often depicted as being in her late teens or early twenties.
One great Starfire and Raven fanfic is 'The Bond Beyond'. It delves into their friendship evolving in a unique way. It shows how they support each other during tough times in the Titans' adventures.
One great 'Starfire x Beast Boy fanfic' is 'A Different Kind of Bond'. It shows their relationship developing in a really unique way. The story has a lot of heartwarming moments as they learn more about each other.
One great Red X and Starfire fanfic could be a story where Red X is initially a villain but slowly starts to have a change of heart due to his interactions with Starfire. Their relationship could be filled with tension and mystery as they try to understand each other's motives.
One great 'Starfire and Robin fanfic' is 'The Unspoken Bond'. It beautifully explores their relationship, from their initial meetings to the deeper emotional connections that develop over time. The story is filled with action and tender moments that really bring out the essence of their relationship in the Teen Titans universe.